If you want the BEST sounding music, download the StudioMusicPlayer/Pro APP
It actually syncs to the brand of headphones, or earplugs that you use, & downloads
the music from your Apple Music; sound quality is phenomenal
If you have several thousand songs in Apple Music, you can't go wrong

When you register your fingerprint for Touch ID, register the front (tip) of your finger. Then when you open your SE, just press the home button and keep your finger in the same position and the phone opens. It turns it into a one-step process instead of two steps.

In addition to Touch ID, do you want to use a password to open your SE instead of a PIN? Go to Settings > Touch ID & Passcode > enter PIN > Scroll down and tap "Change Passcode" > enter old passcode > then tap "Passcode Options" and it gives us the option to use a password instead of a PIN.

The one thing i think is pretty cool is when your phone automatically switches from cellular calls to Wi-Fi calling! so when the iPhone SE senses that you don't have signal, it will use a Wi-Fi network to make and receive calls instead. You don't need any additional apps to make use of this feature, and it will switch between cellular and Wi-Fi automatically, so you don't have to worry about being out of signal.

To turn the feature on go to Settings > Phone > Wi-Fi Calling, and make sure the slider next to 'Wi-Fi Calling on This iPhone' is set to On.